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BQ25700A: How to solve error 'Device Ack Error' in bqstudio.

Part Number: BQ25700A
Other Parts Discussed in Thread: BQSTUDIO, EV2400

Hello,

I am trying to interface bq25700a(Charger IC) to bqstudio. Initially charger ic was successfully detected in bqstudio but now it showing error like 'Device Ack Error'.I also changed charger ic and checked it again but got the same error.So i am not getting where is the problem in the board.Please give me any suggestions.